Intangible and Other Assets (Tables)

12 Months Ended

Dec. 31, 2018

Intangible And Other Assets [Abstract]

Summary of Intangible Assets

Following is a summary of intangible assets as of December 31:

		2018				2017
	Weighted Average Life	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Intangibles:
Patents and licenses, software and hardware designs	6 years	$	5,177	$	3,430	$	5,320	$	3,540
Developed technology	10 years		2,782		2,573		2,782		2,295
Customer relationships and non-compete	9 years		2,838		2,838		2,838		2,621
		$	10,797	$	8,841	$	10,940	$	8,456

Other Assets

Following is a summary of other assets as of December 31:

	2018		2017
Other assets:
Inventories - bauxite raw materials	$	4,160	$	3,527
Other		1,034		5,434
	$	5,194	$	8,961